Bad service. Maybe a ****.

I've been with MTN for 20+ years and I've never had a problem like I've had these past 4 months. Its as though MTN is not interested in keeping up to their standards anymore. I've been calling the Call Centre for the past 4 months but nobody seems to sort out this problem. The signal in my area is bad. They keep telling me that its tge tower in the area that's down but nothing gets sorted out. I even changed my phone 3 times thinking there's a problem with it but no luck. I've just recently upgraded all 6 contracts and now I'm so sick of calling MTN I just feel like canceling all of them. I'm beginning to think its a ****. They sell you a contract for unlimited calls and probably put a block to it. That's why my calls cut after a minutes. 4 months and nothings changed.